Fire-back



(No Model.)

N. B. THWEATT.

FIRE BACK.

Patented Dec. 26

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fire-places of various sizes; and it consists in UNITED STATES PATENTUrrrcn.

NICHOLAS B. THWEATT, OF HICKORY PLAINS, ARKANSAS.

FIRE-BACK.

SPEGIFICATION forming part of Letters Patent No. 269,551, dated December26, 1882. Application filed October 7, 1882. (No model.)

1'0 all whom it may concern.- I Be it known that I,'NICHOLAS B. THWEATT,of Hickory Plains, in the county of Prairie and State of Arkansas, haveinvented certain new and useful Improvements in Fire-Backs; and I dohereby declare that the following is a lull, clear, and exactdescription of the invention, which will enable others skilled in theart towhich it appertains to make and use the same, reference being badto the accompanying drawings, which form a part of this specifica tion.

Figure 1, is a perspective view ot'imy improved fire-back. Fig. 2 is ahorizontal sectional view. Fig. 3 is a perspective view, showing thefire-back extended; and Fig. 41s

a rear view.

Corresponding parts 'in the several figures are denoted by like lettersof'ret'erence.

Thisinvention relates to that class of firebacks or linings toropeutire-places which are adjustable, so that they may be made to fit incertain improvements in theconstruction ot' the same, which will behereinafter fully described, aud particularly pointed out in the claim.

A A in the drawings represent a pair ot'angle-plates.

B is the back plate, which is provided with rearward-projecting bolts U,fitting in slots 1) in the rear leaves, E, of the angle-plates A.

F F are the side plates, which are provided with bolts G, fitting inhorizontal slots H in thet'orward leaves, 1, of the angle-plates. The

several bolts 0 and G are provided with nuts J, which, when tightened,serve to secure the plates B and F in the desired position in relationto the angle-plates.

The side plates, F, are provided at their front ends withoutwardly-projecting flanges K. The outer or rear sides of the sideplates, F, and back plate, B, are provided with vertical ribs orcorrugations L to receive lugs M, projecting from the ends of theaiigle- 'ilates'A. When the side plates and back plate have beenadjusted in the proper position in relation to the angle-plates, so asto adjust-the fire-back to any desired size, the lugs M, by entering thegrooves between the ribs or corrugations L, serve, when the nuts Jare=tightened upon their respective bolts, to retain the I partssecurelyin position and prevent the device from expanding or collapsing.

The operation of my invention will be readily understood. By simplyloosening the nuts the parts may lie-readily adjusted to any desiredposition, thus fitting my improved fireback to a fire-place of any size.The plates A, B, and F, constituting my invention, may be made ofcast-iron or of any other suitable material.

Having thus described my invention, 1 claim and desire to secure byLetters Patent of'the United States- The combination, with theangle-plates A, having slots 1) H and lugs M, of the adjustable backplate, B, and side plates, F, having vertical ribs or corrugations L,and nuts J and bolts 0 G, as and for the purpose setfortht In testimonythat I claim theforegoingfas my own I have hereto attixed my signatureinpresence of two witnesses.

NICHOLAS B. THWEATT.

Witnesses: I I

W. E. BROWN,

ELIAS FRcHLIcH.

